温压补偿在MED装置蒸汽流量测量中的应用  

Application research of temperature and pressure compensation in steam flow measurement in LT-MED plant

作　　者：康权[1] 俞永江[1] 李楠[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《仪器仪表用户》2012年第1期40-42,共3页Instrumentation

基　　金：科技部"十一五"科技支撑项目--5万吨/日低温多效蒸馏海水淡化成套技术与装备开发(2006BAB03A01);2010年中央级公益性科研院所基本科研业务费专项资金(G2010-22)

摘　　要：为解决低温多效蒸馏(MED)淡化过程中蒸汽温度、压力波动引起的蒸汽流量测量不准确的问题,依托30t/d MED淡化中试装置,本文分析了进料蒸汽的温度、压力变化特点,研究选择适用于MED工艺的补偿公式和数学模型,并通过PLC控制实现补偿。结果表明:通过温度、压力补偿提高了MED蒸汽流量测量的准确度,增强了MED淡化系统的运行稳定性和经济性。In order to solve the problem of inaccuracy of steam flow measurement caused by steam temperature and pressure fluctuation during the process of desalination.Based on 30 m3/d MED pilot plant,this paper analyses the characteristic of temperature and pressure fluctuation of feed steam,shows the research on compensation formula and mathematical model applicable in MED process,and how to realize the compensation through PLC control.The results indicate that the accuracy of steam flow measurement gets improved by temperature and pressure compensation,which enhances the stability and economics of the operation of MED desalination system.

关 键 词：低温多效 蒸汽流量 温度 压力 补偿 

分 类 号：TH816[机械工程—仪器科学与技术]